n: 40 m: 560 packed: 13 density: 0 nodes: 0 solveTime: 55750 buildTime: 180 solved: true
{0,7,16}
{1,9,23}
{2,3,6}
{4,29,38}
{5,10,34}
{8,25,28}
{11,35,39}
{12,30,33}
{13,15,18}
{14,21,31}
{17,20,26}
{19,27,37}
{22,24,36}